Tripping mechanism for printing-presses.



PATENTED APR. 24, 1906.

L. B. MORRISON. TRIPPING MEGHANISM FR PRINTING PRESSES.

APPLICATION FILED 8E1T.29.1904.

No. 818,903. PATBNTBD APR. 24, 1906 L. E. MORRISON.

TRIPPING MBCHANISM FOR'PRINTING PRESSES.

APPLIOATION FILED s112129. 1904.

ZSHEBTS--SHEET 2.

, Abeen supplied to the press.

llhlllTEDL 'FFICE LEWIS E. MORRISON, OF PHlLADELPHlA, PENNSYLVANIA.

TRiPPlNC- WlEHANlSW FOR PRlNTlNG-PHESSES.

No. eiseoe.

Spectlcation of Letters Fatent.

Patented April 24, 1906.

Application illad September 29. 1904. Serial No. 226,508.

To all whom L'z'; may concern:

it known that I, LEWIS E. MORRISON, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Tripping Mechanism for Printing- Presses, of which the following is i specification.

This invention relates to a tripping mechanism for preventing the operation .of a printingprcss except'wlien a sheet of paper has The object of this invention is' to provide a strong, simple, and efficient automatic tri ping mechanism which will insure a simpl, direct, and automatic control of a printing mechanism from the sheet of paper which is about to be printed.

To this end this invention consists of a tripping mechanism for printing-presses and of the combinations of parts therewith, as hereinafter described, and more particularly pointed out in the claims at the end of this specification.

ln the accompanying two sheets of drawings, Figure 1 is aside view of sufficient parts of a job-printing press to illustrate the application o my invention thereto. Fig. 2 is a detail view oi the connections operated by the feeding of asheet of paper to the press, and Fig.- 3 is an enlarged detail view of the same. Fig. 4 is a view of the eccentric piece. A tripping mechanism constructed according to this invention has been especially designed for use on job-printing presses. ln using the ordinary bed-and-platcn printingpresses it is now the usual practice to feed the presses by hand. @ne serious objection to lthe use ol automatic feeders in connection with job-printing presses is due to the fact that ir' for `any reason the automatic feeder should fail to operate or the supply of sheets should become exhausted the printing-form would be repeatedly carried up against the platen, spoiling the impression-sheet and the underlays hy means of which the surface of the platen has been made ready for printing any particular Yorm.

"he especial object of the present invenf tion is to provide a tripping mechanism which Will automatically prevent the printing operation of a bed-and-platen or other printingpress except at such times as a sheet has'bcen ied to the press, y

Referring to the accompanying drawings 1for a detail description of an apparatus embodying this invention, designates one of the side frames of a bed-and-platen printingpress. Mounted upon the side frames is a platen 11 for receiving the impression from a form of type mounted on the type-bed 13, which type-bed 13 is carried by the swinging frame 12. These parts may be of any of the usual or preferred constructions employed in bed-and-platen printing-presses. Carried by the side frames 10 is a sheet-feeding mechanism 14, Whichis intended to automatically supply sheets to the registering-table 15. The automatic sheetsupplying mechanism 14 may be of the ordinary or approved constructions and need not be herein described at length, the successive sheets siip licd from the feed mechanism 14 being pre erably fed over the registering-table by fingers or feeding devices engaging the rcar edges of successive sheets. Cooperating with the registering-table 15 I provide connections which are controlled by the passage of successive sheets for preventing the printing action of the press except at a time when a sheet has been fed to the press.

The operating connections for the printing mechanism, as herein illustrated, comprise the main gear or crank wheel 1G, having a crank-pin which receives one end of the link 17. At its other end the link 17 is connected to an eccentric piece 17 a, having an operating-arm 18.` Vlhen the eccentric piece is in normal position, (illustrated in Fig, 1,) the link 17 will swing the type-bed up to full printing position, so that a type formed thereon will he moved up into printing en- Uageinent with thc stationary platen. When, iowever, the eccentric piece is shifted from thc position illustrated in Fig. 1, the length of the connection between the swinging frame, which carries the type-bed, and the crank-wheel which operates the saine will be increased, so that a type-form upon the typebed will be moved up adjacent to but not into contact with the platen. To set the' eccentric piece so as to prevent printing action from taking place except when a sheet has been fed to the press, l employ a pivoted arm 19, having a roller 2U near its upper end, which roller 20 is locatodin position to be engaged by the arm 1S of the eccentric piece. At its lower end the swinging arm 19 is connected by a sprii'ig-prcssed rod 21 to a rockarln 22,which turns with the swing-frame 12, that carries the type-bed. B v means of this construction when thc pivoted arm 19 is left IIO irvv or unlovlivd said arm t9 will movv torward siinultanvousl)r with thv type-hed and its roller 2t) will hv inovvd out ol' thv path of the erin its. When thv arin ll.) is lot-lied, so as to hv ptvvvntvd from moving forward, the roller t.) will rvinain in thv path of the arni l5* and a printing avtion `will hv prvvvntvd. 'l`hv spring on thv rod 2l prnvidvs thv nvvvssary lost, inotion when tht` arm 1) is lovkvd against loiwvard inovvinvnt. The lot-kin;r ineens whivh l vniplov l'or holdin;r thv piv; oted :nni ttl stationary \\'hvn a shvvt has not hevn fed to the press voinprisv thv sliding erin 23 and a Catch '24 votpvrating thvrvwith. The eatvh 2l is lil'tvd up out ol thv Wav of the slidingr pivvv 23 whvnvvvr a shvvt is ivd to the press. The eonnvvtions for doing this are most elvarhr illust rated in Figs. 2 and 3. As shown in thvsv ligurvs, thv vrossrod 'R is provided with a support near its` venter forrvvviving thv sliding pivvv, varrying :i eontavt-n'hevl 26 at its lowvr vnd. rl`hv vontaet-whevl 2G vopvrat vs with t hv registering# tehle l5/.lso as to hv turnvd hy thv passagv of e sheet npon thv rvgistvring-tahlv. 'lurning with the vontavt-whvvl lt is :i small pullev having a tape '37 svvurvd thvrvlo. 'lhv otihvr vnd of the tape '1T is wound on :t sniall pulleyT varrivd hv aspring-prvssvd shal't 2S. At its other vnd the spring-prvssvdshaft N is vonnvvtvd te zt tapv '25 for lil'ting'thv vatvh 24. The tapes 25 and 27 arv wound in opposite diret-tions` upon thv shalt 28, and hy ineens oi. this vonstruvtion whvn thv roll Ztl nnn'inds thv tape 27 l'ront its` lshalt 2N it svrrvs to Wind np thv tapv 25 and lilt thv atvh 2:1'. By nlvnns ol' thvsv vonnvvtions thv passage of :t shvvt alonjr thv rvgistvringtahle t5 rvlvasvs thv tripping nivvhanisni, so

thaty an impression will hv lnadv h v the typvforni. ln order to insnrv a pvrlvvt vot'pvration of thv prvssnrv-rollvr iti With the tahlv l5, l, prtfvidv thv rod l with a downwardly vxtendiirgy linger or proivvtion 23a near its vnd for vng'aginga plat v l), carried by a hvllvrzinh lvvvr pivotvd aty 29. At its upper vnd the hell-crank lvvvr is vonnvvtvtl hv a link Il() to thv downn'anlly-vxtvulling arni ol' 'a hvllera-nk lever lll whivh vng'aees and fot'vvs down the slide carrying thv roll 2G.

l arn aware that. ntnnvrous vhnngvs may hv inside in practicing my invvntion hv thosv who are sltillvd in thv art lwithout departing frein `the svopv ol" my invention as expressed in the vlainis and also that nrv trippingl mechanism may he applied to dill'vrvntl types of presses from the hvd-:ind-platen joh-printing prv'ss which l lnivv herein shown and desvrihvd. l do not wish, therefore, to hv liniitvd to this partiivulnr oonstrnvtion, hut

Pi/'hat l. do vlaini, :ind desire to seenre hy Letters Patent olI thv llnitvd States, is

l. in a printingprvss the eenibinntien of its two members, namely the platen and type-bed, means ;l` n' er erating one of the ineinhers, en vevvntriv pieve for shiftingY the pivotal vonnvvtion between the movable lneinhvr and its operating means7 a, step tor opvretingr the vvvvntriv pivvv, a lovli for said stop votnprisiner a sliding` rod, e latvh sind vonnvvtions for releasing thv latvh h3' feeding a shvvt' to thv press,

'3. ln a printiiig-prvss, the combination et the platen, the inovahlv type-hed, means ier operating the type-heil, an vvvvntrie piece l'or shifting the pivotal Connection hetwven thv type-bvd and itsoperztting ineens, e step lor operating the eccentrivI piece, a lot-,lt for l said stop voinprising a sliding rod, a. la-teh and eonnvvtiens 'for releasing the latch hv feeding ay sheet to the press.

Il. 1n n printing-press, the. combination ell thv platen, the movable type-bed, e link for operatingv the type-herben eccentric piece vonneeting the link with the type-bvd, e stop l'or operating,T the eccentric piece, a lock for seid stop comprising a sliding rod, a, latch and eonnvvtiens forreleavsing the latch hy -feeding; a. sheet to the press 4. In a. printing-press, the,l eenibinetin of thv platen, the movable t-ype-bed, a link for operating the type-hed, en eccentric: pieee with an extended arm conneetingthe link with the type-hed, a stop for operating the vvvvntrie pieve, a lock for said step enrnprising a, sliding rofl, a latch and connections fer rvlvasing the latch by feeding a sheet to the prvss.

.13. ln a printing-press, the combination of thv platen, the movable type-bed, an operati ingr-link, an vuvvntriv piece with finiextended arni vonnvvtiner thv operating-link and typehvd, :L stop ier turtnner thv eccentric piece,

rvonnvvtions Ylor normally moving the Sto' out of operative position, and a lock for shi, lstop voinprising a sliding rod, a. latch and vonnvvtions for releasing' the latch by feeding a lslivvt to the press.

t3. ln :i printing-press,the emnbination yf thv platen, the inovahlv type-hed, un perliting-link, an evvvntriv pivve eoiinveting the Op vrat ing linl und type-hed, a stop fer turning the vvvvntrit: pivve, eonneetiiens for normally moving thv .stop out: ol" operative pesitin, and a, lock l'or said step comprising :i sliding rod, a latch and eennevtiitms for releasing the latch hy feeding ay sheet to the press.

7. ln e. printing-press, the eornbinetien'oi the platen, the movable typehed, a. stopy for preventing the printing o eration of the type-hed, and means Contro led by feeding it sheet of peper to the press for releasing the step veinprising a contact-Wheel engaging the shvet ot' paper,.entl ineens operated by the vontnvt-wheel for moving the stop.

8. In e, printing-press, the eemhinetion of the platen, the movable type-bed, e stop for preventing the printing operation of the type-bed, and ineens controlledby feeding e sheet of paper to the press for releasing the stop comprising e contact-Wheel engaging the sheet of papel', a spring-pressed shaft, a tape adapted to be unwound from the shaft by the contact-Wheel, end a my@ adapted to Wind up en the shaft to move t 1e Stop.'

9. In printing-press, the Combination of the pinten, the nim/able type-bed, n stop for preventingT the printing operation of the type-hed, Ineens controlled by feeding n .sheet et peper te the press for releasing the stop comprising n eentnct-whee1 engaged by the sheet of peper, and connections from the Unimet-wheel fot 'moving the stop and ineens fin' automaticallypiessing the contact-wheel inte position to be engaged by a. succeei'lingv sheet.

lt). In zt printing-press, the combination nl the pinten, the movable type-bed, un opent? ing-link, :m eccentric piece connecting the operating-link and typebed, a stop for turninl;r the eccenttii piece, connections for nornnily inwinnthe step out of operative posibien, n, hwk ter sind stop comprising n. shdiingr rnd, und n latch @06pm-ating therewith, und menus cnntinlied by feeding e sheet to the p 'ess te? releasing the latch comprising e I x i contant-Wheel engaged by the 1, mit 1 t neetinns from the commetwrhmft .tint fue L; the latch.

11. Inn prin 1f-press, thi-www5 -f im o the flatten, the inmueble ingink, nn etvnntiie 1j operating-lint: and (t .n ing the eecentiiu pieve, een mnliy moving the stop ent n. t tien, :t lock for sniti step in Vrod :and n, hitch, cmineet' j; hitch by feeding :i sheet n1" vmnpi'ising n i'mitiztcit wi sheet of peper, e .spi

met on f, adapted te he unina/nini rin L untictv-"h@@i and :t tape mi M 4 k on tne shntt Le snow the inten, mui i 'for pressing the rioni:e.et-whm1 infn gw to be engaged by the snm evt. .z

1n testimony ethernet i. have hoisfnnie :ny hand in the presence nt tu .nimmt witnesses. 

